HDL was established in 1985, as a subsidiary of Herald Holdings Ltd., a publicly listed Hong Kong company.

HDL is a leading Original Design Manufacturer (ODM) specializing in the design and manufacture of magnetic recording heads, fiber optic components and other high tech devices. Furthermore, HDL provides contract design & manufacturing services and solutions for customers with specific needs.

The company is located on 330,000 sq ft of land located in Zhuhai, China with an office in Hong Kong and employs over 1000 workers and staff. HDL has engineering services offices in USA and Europe and has in-house capability to design, prototype, manufacture and market a wide range of products for a large variety of applications.

Since 1994, HDL has been an ISO 9001 certified company with advanced quality systems in place ensuring delivery of high quality products to its customers. In addition, the company is endeavouring into its corporate management structure & systems. HDL is also ISO 14001 certified.

HDL puts priority on quality improvement and technology innovation to produce cutting-edge, high performance products. The company has been utilizing Six Sigma methodology & approach to deliver world-class quality products to its customers. In addition, HDL's strong R&D efforts result in continuous development of new items in order to meet the market demand. As an example, HDL is enhancing its development of "smart thermostats" that can be controlled remotely via various types of radio modules. Furthermore, HDL has been working closely with Microsoft to develop MSN Direct modules (www.msndirect.com).

Over the many years, the company has been dedicated to maintaining its leadership in technology, quality, service, and productivity in order to meet the strict requirements from worldwide customers.